A new virus with sequence similarities to members of the genus Cavemovirus in the family Caulimoviridae was identified in an Epiphyllum hybrid. The complete genome of the virus, tentatively named “epiphyllum virus 4” (EpV-4), was determined to be 7,296 nucleotides long. Its circular genome organization is typical of cavemoviruses, containing four open reading frames. This virus and the two known cavemoviruses share 67-69% and 72-75% overall nucleotide sequence identity in the replicase gene. Phylogenetic analysis placed EpV-4 in a same cluster with the two recognized cavemoviruses. Thus, EpV-4 should be considered a representative of a third species of the genus Cavemovirus. The virus was transmitted by grafting.

与序列的新病毒相似属的成员Cavemovirus家庭花椰菜病毒科在被认定昙花混合。该病毒的完整基因组（暂定名为“埃皮弗鲁姆病毒4”（EpV-4））长7296个核苷酸。它的环状基因组组织是穴状病毒的典型特征，包含四个开放阅读框。该病毒和两种已知的洞穴病毒在复制酶基因中共有67-69％和72-75％的总体核苷酸序列同一性。系统发育分析将EpV-4与两种公认的小病毒一起置于同一簇中。因此，应将EpV-4视为Cavemovirus属第三种的代表。该病毒通过嫁接传播。